This map shows the percentage of occupied housing units lacking complete plumbing facilities in each U.S. county, based on American Community Survey (ACS) 2023 data from Table B25047 (Plumbing Facilities for Occupied Housing Units). “Complete plumbing facilities” are defined as having hot and cold running water, a flush toilet, and a bathtub or shower located inside the housing unit. Percentages are calculated as the share of all occupied housing units in each county that do not meet this definition.